Heyman reports that the Nationals view Shields as a more affordable alternative to top free agents like Zack Greinke. Although Washington had been considered one potential landing spot for Greinke, a National League executive tells Heyman that the Dodgers are "scaring teams away" when it comes to bidding on the winter's top free agent pitcher.

The Red Sox, Dodgers, and Royals are among the other clubs showing interest in trading for Shields, says Heyman.